Active matrix substrate, liquid crystal panel, liquid crystal display unit, liquid crystal display device, television receiver, and method for producing active matrix substrate

A liquid crystal panel comprising an active matrix substrate,

• the active matrix substrate including a substrate on which a transistor element, a pixel electrode, a scanning signal line, a data signal line, and a retention capacitor line are provided,
• the active matrix substrate further including:
• at least two retention capacitor electrodes each facing the retention capacitor line via an insulating film so as to form a retention capacitance;
• and
• connection lines via which the at least two retention capacitor electrodes are connected with the pixel electrode,
• the retention capacitor line having at least one opening which penetrates the retention capacitor line in a direction perpendicular to a surface of the substrate,
• the at least two retention capacitor electrodes being provided for the retention capacitor line, the at least one opening being formed so as to include first regions facing respective second regions in which the at least two retention capacitor electrodes are provided.

A liquid crystal display unit comprising:

• a liquid crystal panel;
• and
• a driver for the liquid crystal panel,
• the liquid crystal panel including an active matrix substrate,
• the active matrix substrate including a substrate on which a transistor element, a pixel electrode, a scanning signal line, a data signal line, and a retention capacitor line are provided,
• the active matrix substrate further including:
• at least two retention capacitor electrodes each facing the retention capacitor line via an insulating film so as to form a retention capacitance;
• and
• connection lines via which the at least two retention capacitor electrodes are connected with the pixel electrode,
• the retention capacitor line having at least one opening which penetrates the retention capacitor line in a direction perpendicular to a surface of the substrate,
• the at least two retention capacitor electrodes being provided for the retention capacitor line, the at least one opening being formed so as to include first regions facing respective second regions in which the at least two retention capacitor electrodes are provided.

A liquid crystal display device comprising:

• a liquid crystal display unit;
• and
• an illumination device,
• the liquid crystal display unit including:
• a liquid crystal panel;
• and
• a driver for the liquid crystal panel,
• the liquid crystal panel including an active matrix substrate,
• the active matrix substrate including a substrate on which a transistor element, a pixel electrode, a scanning signal line, a data signal line, and a retention capacitor line are provided,
• the active matrix substrate further including:
• at least two retention capacitor electrodes each facing the retention capacitor line via an insulating film so as to form a retention capacitance;
• and
• connection lines via which the at least two retention capacitor electrodes are connected with the pixel electrode,
• the retention capacitor line having at least one opening which penetrates the retention capacitor line in a direction perpendicular to a surface of the substrate,
• the at least two retention capacitor electrodes being provided for the retention capacitor line, the at least one opening being formed so as to include first regions facing respective second regions in which the at least two retention capacitor electrodes are provided.

A television receiver comprising:

• a liquid crystal display device;
• and
• a tuner section for receiving a television broadcast,
• the liquid crystal display device including:
• a liquid crystal display unit;
• and
• an illumination device,
• the liquid crystal display unit including:
• a liquid crystal panel;
• and
• a driver for the liquid crystal panel,
• the liquid crystal panel including an active matrix substrate,
• the active matrix substrate including a substrate on which a transistor element, a pixel electrode, a scanning signal line, a data signal line, and a retention capacitor line are provided,
• the active matrix substrate further including:
• at least two retention capacitor electrodes each facing the retention capacitor line via an insulating film so as to form a retention capacitance;
• and
• connection lines via which the at least two retention capacitor electrodes are connected with the pixel electrode,
• the retention capacitor line having at least one opening which penetrates the retention capacitor line in a direction perpendicular to a surface of the substrate,
• the at least two retention capacitor electrodes being provided for the retention capacitor line, the at least one opening being formed so as to include first regions facing respective second regions in which the at least two retention capacitor electrodes are provided.

A method for manufacturing an active matrix substrate,

• the active matrix substrate including a substrate on which a transistor element, a pixel electrode, a scanning signal line, a data signal line, and a retention capacitor line are provided,
• the active matrix substrate further including:
• at least two retention capacitor electrodes each facing the retention capacitor line via an insulating film so as to form a retention capacitance;
• and
• connection lines via which the at least two retention capacitor electrodes are connected with the pixel electrode,
• the retention capacitor line having at least one opening which penetrates the retention capacitor line in a direction perpendicular to a surface of the substrate,
• the at least two retention capacitor electrodes being provided for the retention capacitor line, the at least one opening being formed so as to include first regions facing respective second regions in which the at least two retention capacitor electrodes are provided,
• the method comprising the steps of:
• cutting off a region of the retention capacitor line, the region being defined either by (i) the at least one opening and (ii) a side surface of the retention capacitor line with respect to its extending direction or by a plurality of the at least one opening, so as to electrically separate the region from a rest of the retention capacitor line, whereby a separated region is formed;
• and
• short-circuiting the separated region with each of the at least two of the retention capacitor electrodes at a portion lying directly above the separated region.